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annotate packages/cygmon/current/misc/arm/arm-mon.c @ 76:435cced73e2f ecos-v1_3_1-release

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eCos v1.3.1 merged from eCos master repository on 2000-03-27-23:22:51-BST
author jlarmour
date Tue, 28 Mar 2000 14:10:45 +0000
parents
children 02ea4320376c
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76
435cced73e2f eCos v1.3.1 merged from eCos master repository on 2000-03-27-23:22:51-BST
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1 //==========================================================================
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2 //
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3 // arm-mon.c
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4 //
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5 // Support code to extend the generic monitor code to support
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6 // ARM(R) processors.
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7 //
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8 //==========================================================================
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9 //####COPYRIGHTBEGIN####
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10 //
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11 // -------------------------------------------
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12 // The contents of this file are subject to the Red Hat eCos Public License
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13 // Version 1.1 (the "License"); you may not use this file except in
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14 // compliance with the License. You may obtain a copy of the License at
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15 // http://www.redhat.com/
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16 //
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17 // Software distributed under the License is distributed on an "AS IS"
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18 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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19 // License for the specific language governing rights and limitations under
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20 // the License.
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21 //
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22 // The Original Code is eCos - Embedded Configurable Operating System,
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23 // released September 30, 1998.
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24 //
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25 // The Initial Developer of the Original Code is Red Hat.
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26 // Portions created by Red Hat are
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27 // Copyright (C) 1998, 1999, 2000 Red Hat, Inc.
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28 // All Rights Reserved.
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29 // -------------------------------------------
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30 //
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31 //####COPYRIGHTEND####
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32 //==========================================================================
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33 //#####DESCRIPTIONBEGIN####
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34 //
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35 // Author(s):
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36 // Contributors: gthomas
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37 // Date: 1999-10-20
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38 // Purpose: Support code to extend the generic monitor code to support
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39 // ARM(R) processors.
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40 // Description: Further board specific support is in other files.
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41 // This file contains:
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42 // register names lookup table
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43 //
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44 // Empty Stubs:
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45 // Interval timer - This should really belong to the application
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46 // operating system.
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47 //
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48 // Should not contain:
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49 // low level uart getchar and putchar functions
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50 // delay function to support uart
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51 //
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52 // ARM is a Registered Trademark of Advanced RISC Machines
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53 // Limited.
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54 // Other Brands and Trademarks are the property of their
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55 // respective owners.
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56 //
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57 //####DESCRIPTIONEND####
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58 //
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59 //=========================================================================
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60
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61 #include <setjmp.h>
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62 #include <bsp/bsp.h>
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63 #include <bsp/cpu.h>
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64 #ifdef DISASSEMBLER
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65 #include <dis-asm.h>
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66 #endif
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67
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68 #include "cpu_info.h"
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69 #include "monitor.h"
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70
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71 /* This module is required to provide many of the services defined
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72 in tservice.h */
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73
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74 static char *apcs_names[] = {
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75 "a1", "a2", "a3", "a4",
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76 "v1", "v2", "v3", "v4",
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77 "v5", "v6", "sl", "fp",
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78 "ip", "sp", "lr", "pc",
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79 #if HAVE_FLOAT_REGS
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80 "f0", "f1", "f2", "f3",
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81 "f4", "f5", "f6", "f7",
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82 "fps",
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83 #endif
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84 "ps"
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85 };
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86
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87 static char *standard_names[] =
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88 {
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89 "r0", "r1", "r2", "r3",
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90 "r4", "r5", "r6", "r7",
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91 "r8", "r9", "r10", "r11",
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92 "r12", "r13", "r14", "pc",
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93 #if HAVE_FLOAT_REGS
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94 "f0", "f1", "f2", "f3",
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95 "f4", "f5", "f6", "f7",
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96 "fps",
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97 #endif
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98 "ps",
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99 };
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100
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101
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102 void arm_othernames (void);
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103
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104 struct regstruct regtab[] =
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105 {
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106 { 0, REG_R0, REGTYPE_INT },
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107 { 0, REG_R1, REGTYPE_INT },
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108 { 0, REG_R2, REGTYPE_INT },
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109 { 0, REG_R3, REGTYPE_INT },
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110 { 0, REG_R4, REGTYPE_INT },
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111 { 0, REG_R5, REGTYPE_INT },
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112 { 0, REG_R6, REGTYPE_INT },
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113 { 0, REG_R7, REGTYPE_INT },
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114 { 0, REG_R8, REGTYPE_INT },
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115 { 0, REG_R9, REGTYPE_INT },
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116 { 0, REG_R10, REGTYPE_INT },
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117 { 0, REG_R11, REGTYPE_INT },
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118 { 0, REG_R12, REGTYPE_INT },
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119 { 0, REG_SP, REGTYPE_INT },
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120 { 0, REG_LR, REGTYPE_INT },
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121 { 0, REG_PC, REGTYPE_INT },
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122 #if HAVE_FLOAT_REGS
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123 { 0, REG_F0, REGTYPE_FLOAT },
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124 { 0, REG_F1, REGTYPE_FLOAT },
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125 { 0, REG_F2, REGTYPE_FLOAT },
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126 { 0, REG_F3, REGTYPE_FLOAT },
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127 { 0, REG_F4, REGTYPE_FLOAT },
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128 { 0, REG_F5, REGTYPE_FLOAT },
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129 { 0, REG_F6, REGTYPE_FLOAT },
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130 { 0, REG_F6, REGTYPE_FLOAT },
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131 { 0, REG_FPS, REGTYPE_FLOAT },
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132 #endif
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133 { 0, REG_CPSR, REGTYPE_INT },
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134 { 0, 0, 0 } /* Terminating element must be last */
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135 } ;
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136
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137 void
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138 initialize_mon(void)
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139 {
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140 /* FIXME: Convert ALL variable initializations to assignments
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141 in order to support ROMABLE CODE.
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142 This includes the register table
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143 */
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144
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145 /*
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146 * Call arm_othernames to sync up Cygmon and the disassembler
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147 * and ensure they are using the same set of registernames
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148 */
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149 arm_othernames();
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150
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151 /*
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152 * Call arm_othernames again to revert to the assembler
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153 * default names
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154 */
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155 arm_othernames();
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156
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157 } /* initialize_mon */
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158
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159
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160 /*
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161 read_memory
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162 write_memory
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163 Defaults to generic_mem.c
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164 */
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165
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166
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167 /* SET_BREAKPOINT -
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168 CLEAR_BREAKPOINT
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169 Defaults to generic_bp32.c
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170 */
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171
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172
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173 #ifndef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS
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174
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175 /* Return the currently-saved value corresponding to register "regnum". */
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176 target_regval_t
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177 get_register (int regnum)
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178 {
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179 struct regstruct *p;
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180 target_regval_t reg;
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181 int offset, len;
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182 char *dest = (char*)0;
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183
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184 for (p = regtab; p->registername && p->registernumber != regnum; ++p)
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185 ;
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186
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187 if (p->registername) {
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188 len = bsp_regsize(p->registernumber);
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189 offset = bsp_regbyte(p->registernumber);
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190 switch (p->registertype) {
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191 case REGTYPE_INT:
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192 dest = (char*)&(reg.i);
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193 break;
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194 #if HAVE_FLOAT_REGS
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195 case REGTYPE_FLOAT:
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196 dest = (char*)&(reg.f);
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197 break;
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198 #endif
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199 #if HAVE_DOUBLE_REGS
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200 case REGTYPE_DOUBLE:
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201 dest = (char*)&(reg.d);
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202 break;
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203 #endif
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204 }
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205 if (dest)
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206 memcpy(dest, (char *)mon_saved_regs + offset, len);
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207 } else
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208 reg.i = 0;
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209
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210 return reg;
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211 }
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212
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213
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214
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215 /* Store VALUE in the register corresponding to REGNUM. */
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216 void
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217 put_register (int regnum, target_regval_t value)
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218 {
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219 int offset, len;
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220
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221 len = bsp_regsize(regnum);
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222 offset = bsp_regbyte(regnum);
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223 memcpy((char *)mon_saved_regs + offset, &value, len);
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224 }
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225
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226 #endif // !CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS
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227
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228 /* Change to the alternate register set names */
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229 void
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230 arm_othernames (void)
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231 {
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232 static int regset = 1;
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233 char **name;
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234 int i;
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235
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236 #ifdef DISASSEMBLER
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237 /* Change the disassembler */
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238 regset = arm_toggle_regnames();
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239 #else
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240 regset = (regset == 0) ? 1 : 0;
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241 #endif
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242
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243 /* Change cygmon */
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244 if (regset == 1)
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245 /* Disassembler is using apcs names. */
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246 name = apcs_names;
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247 else
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248 /* Disassembler is using standard names. */
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249 name = standard_names;
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250
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251 for (i = 0; i < (sizeof(apcs_names)/sizeof(apcs_names[0])); i++)
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252 regtab[i].registername = name[i];
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253 }
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254
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255 #ifdef __ECOS__
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256
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257 #include <pkgconf/hal.h>
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258 #include <cyg/hal/hal_arch.h>
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259
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260 int
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261 machine_syscall(HAL_SavedRegisters *regs)
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262 {
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263 int res, err;
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264 err = _bsp_do_syscall(regs->d[0], // Function
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265 regs->d[1], regs->d[2], regs->d[3], 0, // arguments,
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266 &res);
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267 regs->d[0] = res;
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268 regs->pc += 4; // Advance PC
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269 return err;
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270 }
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271 #endif